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PostgreSQL CVE-2026-6575

| EUVDEUVD-2026-30287 MEDIUM
Buffer Over-read (CWE-126)
2026-05-14 PostgreSQL GHSA-f8xc-gmqx-v9fh
PostgreSQL Buffer Overflow Suse Red Hat
4.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SUSE
MEDIUM
qualitative
Red Hat
4.3 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
Patch available
May 14, 2026 - 15:01 EUVD
Analysis Generated
May 14, 2026 - 14:03 vuln.today
CVE Published
May 14, 2026 - 13:00 nvd
MEDIUM 4.3

DescriptionCVE.org

Buffer over-read in PostgreSQL function pg_restore_attribute_stats() accepts array values of unmatched length, which causes query planning to read past end of one array. This allows a table maintainer to infer memory values past that array end. Within major version 18, minor versions before PostgreSQL 18.4 are affected. Versions before PostgreSQL 18 are unaffected.

AnalysisAI

Buffer over-read in PostgreSQL 18.0 through 18.3 allows authenticated table maintainers to infer sensitive memory contents by exploiting mismatched array lengths in the pg_restore_attribute_stats() function during query planning. The vulnerability requires authenticated database access and table maintenance privileges but enables information disclosure without modifying data or causing service disruption.

Technical ContextAI

PostgreSQL's query planner uses the pg_restore_attribute_stats() function to read statistical metadata stored in array structures. The vulnerability exists in CWE-126 (buffer over-read), where the function fails to validate that array values have matching lengths before accessing array elements. When arrays of unmatched lengths are provided, the query planner reads past the end of one array into adjacent memory, exposing uninitialized or sensitive data from the PostgreSQL process heap. This affects PostgreSQL 18.x only (versions before 18 are unaffected), indicating a regression or new feature vulnerability introduced in the PostgreSQL 18 release cycle.

RemediationAI

Upgrade to PostgreSQL 18.4 or later, which includes the fix for the buffer over-read vulnerability. For PostgreSQL 18.0-18.3 deployments, this is the recommended and available patch. Until patching is feasible, apply compensating controls by restricting table maintenance privileges (MAINTAIN permission in PostgreSQL 18) to trusted administrators only. If database access must be exposed to less-trusted users (developers, analysts), grant only SELECT and limited DML privileges, explicitly denying MAINTAIN. Review and audit which database accounts have table maintenance privileges using the PostgreSQL system catalogs. Monitor pg_restore_attribute_stats() function calls and query plans in logs if detailed query logging is enabled. Note that restricting privileges may limit legitimate maintenance tasks, so coordinate with database administrators to ensure operational continuity.

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

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CVE-2026-6575 vulnerability details – vuln.today
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